Centrifugal casting machine



1,643,265 Sept' 1927' L. I. YEOMANS CENTRIFUGAL CASTING MACHINE Filed Nov. 1, 1924 2 Sheets-Sheet 1- I NV EN TOR Lam/21.35

ATTORNEYJZ WITNESS.

t. l Sep 927 1. YEOMANS CENI'RIFUGAL CASTING MACHINE Filed Nov. 1, 1924 2 Sheets-Sheet 2 INVENTOR. .Zaczbrz Iyomww.

ATTORNEYS.

Patented Sept. 20, 1927.

} UNITED STATES LUCIEN I. YEOMANS, or" CHICAGO, ILLINOIS, nssrenon'ro A. o. sitrrn coaroimrron', I

PATENT OFFICE. v

OF MILWAUKEE, WISCONSIN, A CORPORATION OF NEW YORK cnivrnrrueer. cesrme macnmn.

Application filed November 1 1924. Serial No. 747,142. 1 I

The invention relates to machines designed for use in casting tubular articles by the centrifugal process. v

It is embodied in a structure in which the rotating mold. is provided with adjunctive devices by which a trough containing a measured'quantity of molten metal may be inserted in the mold and partially rotated so as topermit the molten metal to be dumped therefrom and flow evenly over the edge of the trough so as to be evenly d stributed over the surface of the mold, with means for supporting the trough in proper position while being introduced into and withdrawn from the" mold, and during the dumping operation.

The invention further resides in the positioning within the mold of a stationary track or raceway over which the trough may be moved.

The invention also comprises means for withdrawing the casting from the mold, such means residing in a truck or carrier operating over the stationary track or raceway before mentioned, whereby when the casting has set at a suitable temperature it may be withdrawn from the mold preparatory to another casting operation. The carrier for withdrawing the casting is provided with means for engaging the casting at its upper side so as to free its lower side from engagement with the mold, and so facilitate its removal from the mold. I

The invention further resides in means for supportingthe said track or race-way at one end so that the casting may be withdrawn without disturbing the position or relative location of the track, this being effected by withdrawing part of the supports at one time to permit movement of the casting, then restoring to position the support previously withdrawn, and then w1thdraw ing the other support to permit the clear and unobstructed movement of the casting over the track or race-way, and away from the casting machine.

The features of novelty residing in the invention will nowbe pointed out in connection with the accompanying drawings, and then set forth in the appended claims.

In'the drawings:

Figure 1 is a verticalsectionaI view longitudinally ofmy improved machine.

Fig. 2 is a transverse sectional view on the line 2-2, Fig. tion of the arrows. I

Fig. 3 is a view in elevation of one of the supports for the track orrace-way over whichthe pouring trough and the truck or piarrier move, looking from the right of 1, looking in the direc- In the drawings, the numerals 10 and 11 indicate stands'provided with large openings through which the rotatable mold 12 may be passed, one stand being located near each end of the mold. Supporting rollers 13 and 14 are journaled in the lower part of each of the stands at opposite sides thereof and in separated positions to receive the mold which is supported thereon. A third roller 15.is journaled in a floating bearing at .the top of each stand, and is caused to engage the periphery of the mold by means of expansion springs 16, which are adjustable as to their pressureupon the journals of the roll 15 by means of screws 17. The cap or dam 18 upon one end of the mold is provided with a pulley 19, by means or.

which a driving belt may be utilized for imparting a movement of rapid rotation to the mold during the casting operation. The cap or (lam 20 at the other end of the mold is held in position by means of outwardly driven radial keys 21, which engage in eyes formed in projection extending from the mold, or by any other suitable means, the construction being such that the cap or dam 20 may be removed from its closing position in an expeditious manner.

Secured in position between the stands 10 and 11 is a stand 22 in which are journaled guiding rollers 23 and 24, which receive between them a circumferential rib 25 placed about the exterior-of the mold, and through this construction the mold is held from longitudinal movement. The parts thus far described may be of ordinary construction.

Adjacent the driven end of the mold, is a stand 26 provided with a bracket 27 upon which rests one end of a track or race-way 28 passed'throu h the tubular mold and the ring-like caps thereon. This track-28 may be substantially in the form of an I-beam. A pair of brackets 29, one of which is shown in Fig. 1, is attached to opposite sides of the track 28 about midway of its length and another air of similarly arran ed brackets 31 an 32 is attached to the ot on and the brackets 31 and 32 in the same manner engage the ends of like screws 35 and 36, the screws being threaded into rotating nuts 37,-which are supported upon stands 38, resting upon. the floor.

y The nuts 37 are formed circumferentially as worm gears 39, eachipair of which is en gaged by worms 40, upon a transverse shaft 41, which may be rotated to simultaneously ralse and lower the screws of a pair into and 3 out of engagement with the brackets upon the'track 28. The pairs of screws are arranged for alternate operation, so that the till all

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track 28 is supported by not less than one pair of screwsat all times.

Trolleys 42 and 43 operate overthe lower flange of the track 28, and depend therefrom so as to support. a pouring trough 44, which is journaledat its ends in the said trolleys, so. that it may be partially rotated to empt the mo ten metal therein into the mold, suc metal flowing over the edge of the trough in a thin. but wide stream, so that the fluid metal is evenly distributed over the surface of the mold. One of the journals of the trough 44 is extended as at 45, and to the projecting end of the shaft thus formed, is ailixed a hand Wheel 46, or other device, for convenient operation in partially rotating the trough to empty its contents. 1

The trolley mounting for the pourin trough enables the latter to be freely move along the track 28, both from the operative position shown as well as into its retracted position at the other end of the track. In such retracted position, the trough is adapt ed to receive a measured charge of molten metal from the near-by furnace, and then moved along the track to its operativeposition within the mold, after which it may be turned so that the molten metal will flow into the mold in the manner described. The mold is then rotated to form the-castafter the casting has been made, it is Withdrawn from the mold by a specially de-. signed truck or carrier 47, which operates along the top flange of the track28. The

platform of the truck is equipped with casting supports 48 and 49, which normally lie in a plane below that of the inner surface of the-casting 50 at itsupper side, so as to permit a free and unobstructed movement titi of the truck into the mold, and into a posi tion where it may receive and support the I casting.

purpose which The casting supports 48 and49 are proyided with depending pins which are gulded 111 the platform of the truck so as to permit vertical movement of the said supports. A

49, .so that as the wedges enter further into such spaces, the said supports48 and 49 are raised into engagement with the interior surface of the casting. The shrinkage of the casting in cooling frees it from frictional engagement with the surface of the mold,

so that the casting may be easily withdrawn in the outward movement of the truck.

After the-casting has been made and engaged by the truck, as a preliminary to its withdrawal from the mold, the near pair of screws 33 are run down to a lower position so that their upper ends will be below the path of movement of the casting, and thus permit the movement of the same out from the mold. When the truck and the casting have been moved to the dotted line position shownin F ig. 1, the screws 33 are run up so as to engage the brackets 29 and support the track 28. 'The screws35 and 36 are then withdrawn as before, soas, to enable the casting 50 to be taken away from the machine, after which the said screws are r0 stored to their supporting position with relation to the track 28. The operations describedare repeatedas successive castings are .made.

Having thus described my invention, what I claim: and desire to secure by Letters Pat- I cut of the United States, is:

track extending into the mold and having fixed support at one end and movable sup port at theother, whereby the casting may be withdrawn from themold without disturbing the arrangement of the said track,

and a truck movable over the track for withdrawing the casting from the mold.

3. In a centrifugal casting machine, a mold and means for rotating the same, a track extending into the mold, and a truck operating along the track into and out of the mold and provided with means forengaging the casting, the said track having fixedsupport at one end and movable support at the other, whereby the casting may movewith the truck andbe withdrawn from the casting machinewithout disturbing the arrangementof the said track.

4. In a centrifugal casting machine, a mold and means for rotating the same, a track extending into the mold, a truck operating over the track into and out of the mold and provided with means for engaging the casting, the said track having a fixed support at one end and a removable support at the other, the latter support comprising screw mechanism spaced apart a distance exceeding the length of the casting to permit movement of the truck with the casting, and means for withdrawing the screw mechanism in alternation to permit removal of the casting from the machine without disturbing the arrangement of the track.

5. In a centrifugal casting machine, a

mold and means for rotating the same, a track extending into the mold, a truck operating thereover, and means on the truck engageable with the casting to withdraw the casting from the mold 0n the outward movement of the truck.

6. In a centrifugal casting machine, a

mold and means for rotating the same, a track extending into the mold, a truck operating thereover and provided with meansfor engaging the casting, and means operating the said means into engagement with the casting to withdraw the latter from the mold in the outward movement of the truck.

7. In a centrifugal casting machine, a

mold'and means for rotating the same, a a

track extending into the m0ld,"a truck operatlng thereover-and provided with means for engaging the casting, and means on the truck for operating the said means radially into engagement with the casting to withdraw the latter from the mold in the outward movement of the truck.

In testimony whereof, I have signed my name at Milwaukee, this 27th day of October, 1924.

LUCIEN I. YEOMANS. 

